#173683#173683

#173683 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.2% C 0.135 H 264.1°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX#173683
RGBrgb(23, 54, 131)
HSLhsl(223, 70%, 30%)
HSVhsv(223, 82%, 51%)
CMYKcmyk(82.4%, 58.8%, 0%, 48.6%)
CIE-LABlab(25.13, 19.19, -46.49)
CIE-LCHlch(25.13, 50.29, 292.43°)
OKLaboklab(36.15% -0.0138 -0.1342)
OKLCHoklch(36.15% 0.135 264.1)
XYZxyz(5.7678, 4.4585, 22.0249)
Luminance0.0446 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#173683 #836417
analogous
#176C83 #173683 #2E1783
triadic
#173683 #831736 #368317
tetradic
#173683 #83176C #836417 #17832E
square
#173683 #83176C #836417 #17832E
split-complementary
#173683 #832E17 #6C8317
monochromatic
#050B1B #0E214F #173683 #204BB7 #3867DC

Accessibility & contrast

On white

11.10
#173683 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.89
#173683 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173683
11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##173683#FFFFFF#000000##FFFFFF
##1736831.0011.101.8911.10
#FFFFFF11.101.0021.001.00
#0000001.8921.001.0021.00
##FFFFFF11.101.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004186
Deuteranopia (green-blind)
#003782
Tritanopia (blue-blind)
#004957
Achromatopsia (no color)
#3C3C3C

Design tokens & code

CSS
--color: #173683;
/* rgb */ color: rgb(23, 54, 131);
/* oklch */ color: oklch(36.2% 0.135 264.1);
Tailwind
colors: {
  custom: {
    50: '#686ca8',
    500: '#173683',
    950: '#000000',
  },
}
SCSS
$custom: #173683;
$custom-light: #686ca8;
$custom-dark: #000000;
JSON
{
  "hex": "#173683",
  "rgb": {
    "r": 23,
    "g": 54,
    "b": 131
  },
  "hsl": {
    "h": 222.778,
    "s": 70.13,
    "l": 30.196
  },
  "oklch": {
    "l": 0.36154,
    "c": 0.13496,
    "h": 264.1
  },
  "luminance": 0.04459
}

Semantic roles & 50–950 ramp

primary
#173683
secondary
#B7953F
accent
#BA3BED
background
#F6F6FA
surface
#ECEBF4
border
#C7C6CE
text
#070610
muted
#7A7A7F

Preview Lab

Preview with #173683

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →

#173683 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva